Apparatus for resharpening safety razor blades



arch H9, 1l935. D` M. VIS, JR L994799 I APPARATUS FOR RESHARPENING SAFETY RAZOR BLADES Filed Aug. 23, 1933 DANIEL MARINU W5 JR.

INVENTOR ATTORNEYS Patented Mar. 19, 1935 UNITED STATES APPARATUS FOR RESHARPNING SAFETY RAZOR BLADES Danil Marinus Vis, Jr., 'Ihe Hague, Netherlands Application August 23, 1933, Serial No. 686,327' In the Netherlands September 30, 1932 1 Claim.

well sharpened on the cylindrical inner wall of a tumbler or hollow cylinder of glass or other material. A safety-razor blade can for instance a be moved backwards and forwards with a nger over the inner wall of a tumbler sharpened.

This method of re-sharpening however has several disadvantages. If the razor blade is sharpened in this way with the finger, it is possible that the blade is not suiiicientlypressed down or pressed down too much and consequently flexes, so that the cutting edges do not touch the inner wall of vthe cylinder. It also is possible that the blade slants and consequently only touches the inside of the cylinder by the extremities.

The invention relates to an apparatus by means of which it is lpossible to sharpen the .blades under uniform pressure, to be regulated, over the inner wall of a cylinder or substantially cylindrical or tubular member closed at one end, while at the same time the slanting of the blades is prevented. This is effected by providing a stub shaft extending through the closed end of the cylinder, a handle located outside the cylinder for rotating said stub shaft, a leaf spring mounted on the inner end of said stub shaft and rotatable with it, said leaf spring tending to press the blade holder connected toits free end against the inner wall of-said cylinder. The inner wall of the cylinder can be made of glass, iron, copper, ebonite, leather.

The apparatus will now be explained in detail with the aid of a diagrammatic drawing.

'Figure' 1 represents a longitudinal section of the apparatus according to the invention.

Figure 2 represents a partial transverse vsection of the apparatus according tothe invention.

In Figure 1 a represents a hollow cylinder. In the centre of the cylinder bottom a stub shaft b and so be is provided, rotatable from the outside by a handle c; on the inner end of said stub shaft is mounted one or more leaf springs d, each of them having springs. As the resilience of the leaf springs is It is known that safety-razor blades can be invariable, the pressing power of the blades on the inner wall of the cylinder also is always the same. As the shaft has an invariable position in respect ofthe sharpening cylinder, the irregular ar slantingly directed forces that can be produced by the hand on the handle c do not aiect unfavourably the pressure or the position of the blade. This combination assures a correct sharpening, whichever way the handle c may be turned. The blade-holders e can be fast or hingedly connected with the leaf springs d to assure a better distribution of the pressure on the blade to be sharpened. The blade-holders e comprise studs f, by which the blade g to be sharpened is carried along and the right position during the sharpening assured. In order to easily insert the blade to be sharpened in the blade-holders e, a grip h is attached to each blade-holder, by which the blade-holder can be removed from the cylinder wall. After one side of the blade has been sharpened, the blade can be easily removed from the blade-holders by means of the grips h and the other side be sharpened.

What Iclaim and desire to secure by Letters Patent of the United States is:-

A manually operated device for resharpening and .honing safety razor blades, comprising the combination, with a hollow and practically cylindrical member having one closed end, of a rotatable stub shaft extending through said closed end and to a short extent exterorly and interiorly of the same, a manual crank xed upon the exterior end of said stub shaft whereby to rotate the shaft, a pair of correspondingly opposite, connected and mutually counterbalancing resilient arms secured to the'inner end of the stub shaft immediately within the closed end of said cylindrical member and extending toward pposite\sides of the cylindrical wall thereof in the general direction of the open end of the same, a blade holder hinged to the free end of each of said resilient arms and providedwith projections adapted to properly locate a blade upon the blade holder, and a projection forming a grip member upon each of said blade holders extending in the general direction of the open end. of the cylindrical member, by which to resiliently displace either blade holder away from the cylindrical wall for replacement of the blade thereon from said open end of said cylindrical member.

DANn'iL MARINUS vrs. Jn. 

